org.apache.flink.runtime.io.network.api.writer

类 RecordWriter<T extends org.apache.flink.core.io.IOReadableWritable>

java.lang.Object

org.apache.flink.runtime.io.network.api.writer.RecordWriter<T>

类型参数:

T - the type of the record that can be emitted with this record writer

所有已实现的接口:

AvailabilityProvider

直接已知子类:

BroadcastRecordWriter, ChannelSelectorRecordWriter

public abstract class RecordWriter<T extends org.apache.flink.core.io.IOReadableWritable>
extends Object
implements AvailabilityProvider

An abstract record-oriented runtime result writer.

The RecordWriter wraps the runtime's ResultPartitionWriter and takes care of channel selection and serializing records into bytes.

嵌套类概要

从接口继承的嵌套类/接口 org.apache.flink.runtime.io.AvailabilityProvider

AvailabilityProvider.AvailabilityHelper

字段概要

字段

限定符和类型	字段和说明
static String	DEFAULT_OUTPUT_FLUSH_THREAD_NAME Default name for the output flush thread, if no name with a task reference is given.
protected boolean	flushAlways
protected int	numberOfChannels
protected Random	rng
protected org.apache.flink.core.memory.DataOutputSerializer	serializer
protected ResultPartitionWriter	targetPartition

从接口继承的字段 org.apache.flink.runtime.io.AvailabilityProvider

AVAILABLE

方法概要

限定符和类型	方法和说明
void	abortCheckpoint(long checkpointId, CheckpointException cause)
void	alignedBarrierTimeout(long checkpointId)
abstract void	broadcastEmit(T record) This is used to broadcast streaming Watermarks in-band with records.
void	broadcastEvent(AbstractEvent event)
void	broadcastEvent(AbstractEvent event, boolean isPriorityEvent)
protected void	checkErroneous()
void	close() Closes the writer.
abstract void	emit(T record) This is used to send regular records.
protected void	emit(T record, int targetSubpartition)
void	flushAll()
CompletableFuture<?>	getAvailableFuture()
void	randomEmit(T record) This is used to send LatencyMarks to a random target channel.
static ByteBuffer	serializeRecord(org.apache.flink.core.memory.DataOutputSerializer serializer, org.apache.flink.core.io.IOReadableWritable record)
void	setMaxOverdraftBuffersPerGate(int maxOverdraftBuffersPerGate) Sets the max overdraft buffer size of per gate.
void	setMetricGroup(TaskIOMetricGroup metrics) Sets the metric group for this RecordWriter.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.apache.flink.runtime.io.AvailabilityProvider

and, isApproximatelyAvailable, isAvailable, or

字段详细资料

DEFAULT_OUTPUT_FLUSH_THREAD_NAME

@VisibleForTesting
public static final String DEFAULT_OUTPUT_FLUSH_THREAD_NAME

Default name for the output flush thread, if no name with a task reference is given.

另请参阅:

常量字段值

targetPartition

protected final ResultPartitionWriter targetPartition

numberOfChannels

protected final int numberOfChannels

serializer

protected final org.apache.flink.core.memory.DataOutputSerializer serializer

rng

protected final Random rng

flushAlways

protected final boolean flushAlways

方法详细资料

emit

protected void emit(T record,
                    int targetSubpartition)
             throws IOException

抛出:

IOException

broadcastEvent

public void broadcastEvent(AbstractEvent event)
                    throws IOException

抛出:

IOException

broadcastEvent

public void broadcastEvent(AbstractEvent event,
                           boolean isPriorityEvent)
                    throws IOException

抛出:

IOException

alignedBarrierTimeout

public void alignedBarrierTimeout(long checkpointId)
                           throws IOException

抛出:

IOException

abortCheckpoint

public void abortCheckpoint(long checkpointId,
                            CheckpointException cause)

serializeRecord

@VisibleForTesting
public static ByteBuffer serializeRecord(org.apache.flink.core.memory.DataOutputSerializer serializer,
                                                            org.apache.flink.core.io.IOReadableWritable record)
                                                     throws IOException

抛出:

IOException

flushAll

public void flushAll()

setMetricGroup

public void setMetricGroup(TaskIOMetricGroup metrics)

Sets the metric group for this RecordWriter.

getAvailableFuture

public CompletableFuture<?> getAvailableFuture()

指定者:

getAvailableFuture 在接口中 AvailabilityProvider

返回:

a future that is completed if the respective provider is available.

emit

public abstract void emit(T record)
                   throws IOException

This is used to send regular records.

抛出:

IOException

randomEmit

public void randomEmit(T record)
                throws IOException

This is used to send LatencyMarks to a random target channel.

抛出:

IOException

broadcastEmit

public abstract void broadcastEmit(T record)
                            throws IOException

This is used to broadcast streaming Watermarks in-band with records.

抛出:

IOException

close

public void close()

Closes the writer. This stops the flushing thread (if there is one).

checkErroneous

protected void checkErroneous()
                       throws IOException

抛出:

IOException

setMaxOverdraftBuffersPerGate

public void setMaxOverdraftBuffersPerGate(int maxOverdraftBuffersPerGate)

Sets the max overdraft buffer size of per gate.